6. Provide the reagents for the synthesis for albuterol (a bronchodilator) from the given starting material. OLX OH OH OH Į

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### Synthesis Pathway for Albuterol

**Question 6:** Provide the reagents for the synthesis of albuterol (a bronchodilator) from the given starting material.

**Synthesis Pathway Description:**

1. **Starting Material:** The given starting material is a benzene ring with a methoxy group (\( \text{-OCH}_3 \)) and a ketone (\( \text{C=O} \)) attached in the para position.

2. **First Reaction:** 
   - The ketone in the starting material undergoes halogenation (chlorination) at the benzylic position.
   - Resulting compound: The structure now has a chlorine (\( \text{-Cl} \)) substituent at the benzylic position.

3. **Second Reaction:**
   - The compound undergoes dehydrohalogenation, leading to the formation of a double bond at the benzylic position.
   - Resulting compound: An alkene is introduced in place of the chlorine. The structure features a benzene ring with an isopropylidene group.

4. **Third Reaction:**
   - The alkene undergoes epoxidation, forming an epoxide at the double bond.
   - Resulting compound: The structure features an epoxide ring attached to the benzene ring via the isopropylidene linkage.

5. **Fourth Reaction:**
   - The epoxide undergoes ring opening and subsequent reaction to introduce an amino alcohol group.
   - Final Product: The resultant compound, albuterol, features an amino alcohol group substituted into the structure.

**Albuterol Structure:** Albuterol consists of a benzene ring substituted with a hydroxyl group (\( \text{-OH} \)) and a tert-butylamino group (\( \text{-NHCH(CH}_3\text{)CH}_2\text{OH} \)) on adjacent carbons, and another hydroxyl group (\( \text{-OH} \)) para to the original hydroxyl group.

The graphical flowchart emphasizes each transformation step, starting from the initial benzene derivative and culminating in the synthesis of albuterol—an effective compound used in the treatment of bronchospasm.
Transcribed Image Text:### Synthesis Pathway for Albuterol **Question 6:** Provide the reagents for the synthesis of albuterol (a bronchodilator) from the given starting material. **Synthesis Pathway Description:** 1. **Starting Material:** The given starting material is a benzene ring with a methoxy group (\( \text{-OCH}_3 \)) and a ketone (\( \text{C=O} \)) attached in the para position. 2. **First Reaction:** - The ketone in the starting material undergoes halogenation (chlorination) at the benzylic position. - Resulting compound: The structure now has a chlorine (\( \text{-Cl} \)) substituent at the benzylic position. 3. **Second Reaction:** - The compound undergoes dehydrohalogenation, leading to the formation of a double bond at the benzylic position. - Resulting compound: An alkene is introduced in place of the chlorine. The structure features a benzene ring with an isopropylidene group. 4. **Third Reaction:** - The alkene undergoes epoxidation, forming an epoxide at the double bond. - Resulting compound: The structure features an epoxide ring attached to the benzene ring via the isopropylidene linkage. 5. **Fourth Reaction:** - The epoxide undergoes ring opening and subsequent reaction to introduce an amino alcohol group. - Final Product: The resultant compound, albuterol, features an amino alcohol group substituted into the structure. **Albuterol Structure:** Albuterol consists of a benzene ring substituted with a hydroxyl group (\( \text{-OH} \)) and a tert-butylamino group (\( \text{-NHCH(CH}_3\text{)CH}_2\text{OH} \)) on adjacent carbons, and another hydroxyl group (\( \text{-OH} \)) para to the original hydroxyl group. The graphical flowchart emphasizes each transformation step, starting from the initial benzene derivative and culminating in the synthesis of albuterol—an effective compound used in the treatment of bronchospasm.
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